Machine for yieldably presenting work to buffing or polishing wheels or belts



J y 29, 1952 H. G. PERKINS f 2,604,740

MACHINE FOR YIELDABLY PRESENTING WORK TO v BUFFING 0R POLISHING WHEELS0R BELTS Filed May 5, 1950 v 2 SHEETSSEET 1 "'z; l 1| W 1 6+ 1/7 1' INVEN TOR.

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July 29, 1952 H. G.- PERKINS 2,604,740

MACHINE FOR YIELDABLY PRESENTING WORK T0 BUFFING OR POLISHING WHEELS ORBELTS Filed May 5, 1950 V 2 SHEETS-SI-IEET 2 d n 30 304 ,7- 4 HCIIIJ 27I Z7 5 ,2: -15 22 IN VEN TOR.

on a piston-like support 26. The piston 26 is slidably mounted in a bossor bushing 21 formed on the underside of the hand operated lever 28. Thelever 28 is pivotally supported at 29 on an ear 3!] projecting from theright front corner of the slide plate l5. A coil spring 3| is compressedbetween an abutment on the fixed end of the lever and an adjustable nut32 carried on a threaded pin 33 extending from the piston 26. A pin andslot connection 34 between the piston and bushing 2! keeps the roller 25in the same plane as the cam plate 22 and limits the extension of thespring. It Will be noted that the slide plate I is provided with analternate ear 38A on its right rear corner so that the machine can beeasily adapted for right or left hand operation by simply mounting theabutment bracket 24 and lever 28 on the rear side of the slide plate andreversin the upright 6 on the slide plate.

When the lever 28 is swung inwardly to engage the roller 25 with the camsurface 23 and locking detent 24, the spring 3! is compressed urging theslide plate l5 and upright 6 toward the polishing element ll. Should theworkpiece 9 mounted on the turret It! be eccentric with respect to thespindle 8, the increased pressure of the eccentric portions of the workon the polishing wheel II will then cause the entire head and slideplate IE to move rearwardly against the compression of the spring 3| andthe spring will then function to return the concentric portions of theworkpiece to the polishing element with sufficient pressure to obtainefilcient' polishing action all around the workpiece.

In order to permit the machine to be used without the previouslydescribed yielding action the longitudinal slide 5 is provided with anupstanding roller 35 near the center of its left hand edge. The rolleris mounted on a screw 36 and projects upwardly into the path of alocking rotor 3! positioned in an upwardly offset, downwardly recessedportion on the left side of the slide plate l5. The rotor 37 iseccentrically mounted on a pin 38 and the pin is provided with anoperating crank and handle 39 located on the top side of the slideplate. The rotor 31 is transversely slotted as at 40 so that operationof the lever 39 will position the rotor to either pass over the roller35 or to lockingly engage the roller as illustrated in Fig. 4. With therotor engaging the roller 35 the slide plate l5 cannot move away fromthe polishing element l I and the engagement of the end plates l8 withthe left edge of the longitudinal slide will prevent movement of theslide plate in the opposite direction. In the locked position of theslide plate, the lever 28 and roller 25 will normally be disengaged fromthe cam plate 22.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

1. In combination with a rotatable indexmg turret having individuallyrotatable work holding spindles thereon, a support for said turretincluding superimposed longitudinal and transverse adjustable slidemembers, slideways extending transversely of said longitudinal slidemember, a slide plate slidably mounted on said slideways, said turretbeing mounted on said slide plate, a cammed abutment on said1ongitudinal slide member, a lever pivotally secured to said slide plateand swingable across said abutment, a roller slidably mounted on saidlever and arranged to coact with said abutment, a

spring adjustably compressed between said roller and the fixed end ofsaid lever, a locking rotor having an operating lever and eccentricallyrotatably mounted on said slide plate, a second roller projecting fromsaid longitudinal slide member into the path of movement of said rotor,said rotor being slotted to selectively pass or engage said secondroller, and travel limiting stops coacting between said longitudinalslide member and said slide plate in opposition to the locking action ofsaid rotor and said second roller.

2. In combination with a rotatable work holding spindle, a support forsaid spindle including superimposed longitudinal and transverseadjustable slide members, slideways extending transversely of saidlongitudinal slide member, a slide plate slidably mounted on saidslideways, said spindle being supported on said slide plate, a cammedabutment on said longitudinal slide member, a lever pivotally secured tosaid slide plate and swingable across said abutment, a roller slidablymounted on said lever and arranged to coact with said abutment, a springadjustably compressed between said roller and a fixed position relativeto said slide plate, a locking rotor having an operating lever androtatably mounted on said slide plate, a second roller projecting fromsaid longitudinal slide member into the path of movement of said rotor,said rotor being cut away to selectively pass or engage said secondroller, and travel limiting stops coacting between said longitudinalslide member and said slide plate in opposition to the locking action ofsaid rotor and said second roller.

3. In combination with a rotatable work holding spindle, a support forsaid spindle including superimposed longitudinally and transverselyadjustable slide members, slideways extending transversely of the upperof said slide members, a slide plate slidably mounted on said slideways,said spindle being supported on said slide plate, a cammed abutment onsaid upper member, a lever pivotally secured to said slide plate andswingable into alignment with said abutment, a cam follower slidablymounted on said lever and arranged to coact with said abutment, a springadjustably compressed between said cam follower and the fixed end ofsaid lever, a looking rotor having an operating lever and rotatablymounted on said slide plate, a projection on said upper slide member inthe path of movement of said rotor, said rotor being cut away toselectively pass or engage said projection, and travel limiting stopscoacting between said upper slide member and said slide plate inopposition to the locking action of said rotor and said projection.

4. In combination with a rotatable Work holding spindle, a support forsaid spindle including superimposed longitudinally and transverselyadjustable slide members, slideways extending transversely of the upperof said slide members, a slide plate slidably mounted on said slideways,said spindle being supported on said slide plate, a cammed abutment onsaid upper member, a lever pivotally secured to said slide plate andswingable into alignment with said abutment, a cam follower slidablymounted on said lever and arranged to coact with said abutment, a springcompressed between said cam follower and a stop on said platelongitudinally fixed relative to said slide plate, a locking rotorhaving an operating lever and rotatably mounted on said slide plate, aprojection on said upper slide 0 member in the path of movement of saidrotor, said rotor being cut away to selectively pass or engage saidprojection, and travel limiting stops coacting between said upper slidemember and said slide plate in opposition to the locking action of saidrotor and said projection.

5. In combination with a rotatable work holding spindle, a support forsaid spindle including superimposed longitudinally and transverselyadjustable slide members, slideways extending transversely of the upperof said slide members, a slide plate slidably mounted on said slideways,said spindle being supported on said slide plate, a cammed abutment onsaid upper member, a lever pivotally secured to said slide plate andswingable into alignment with said abutment, a cam follower slidablymounted on said lever and arranged to coact with said abutment, and aspring compressed between said cam follower and a stop on said platelongitudinally fixed relative to said slide plate.

6'. In combination with a rotatable work holding spindle, a support forsaid spindle including superimposed longitudinally and transverselyadjustable slide members, slideways extending transversely of one ofsaid slide members, a slide plate slidably mounted on said slideways,said spindle being supported on said slide plate, a cammed abutment onsaid one slide member, a lever pivotally secured to said slide plate andswingable into alignment with said abutment, a cam follower slidablymounted on said lever and arranged to coact with said abutment, a springadjustably compressed between said cam follower and a stop on said platelongitudinally fixed relative to said slide'plate, a locking memberhaving an operating lever and rotatably mounted on said slide plate, aprojection on said one slide member in the path of movement of saidlocking member, said locking member being swingable to selectively passor engage said projection.

7. In combination with a rotatable work holding spindle, a support forsaid spindle including superimposed longitudinally and transverselyadjustable slide members, slideways extending transversely of one ofsaid slide members, a slide plate slidably mounted on said slideways,said spindle being supported on said slide plate, an abutment on saidone slide member, a lever pivotally secured to said slide plate andswingable into alignment with said abutment, a follower slidably mountedon said lever and arranged to coact with said abutment, and a springcompressed between said follower and a stop on said plate longitudinallyfixed relative to said slide plate.

8. In a machine for presenting workpieces to a finishing tool, thecombination of a head having a rotatable work holding element thereon, asupport member having slideways thereon, a slide member slidable on saidslideways for motion toward and away from said tool, said head beingcarried by said slide member, means for biasing said slide member andhead toward said tool including a lever pivotally mounted on one of saidmembers, a cammed abutment on the other of said members and spaced fromthe pivot of said lever, a movable spring abutment carried by said leverand swingable therewith into and out of engagement with said cammedabutment on said other of said members, a compression spring adjustablycompressed between said movable abutment and said one of said members,and a stop on said lever limiting the extension of said spring and saidmovable abutment.

9. In a machine for presenting workpieces to a finishing tool, thecombination of a head having a rotatable work holding element thereon, asupport member having slideways thereon, a slide member slidable on saidslideways for motion toward and away from said tool, said head beingcarried by said slide member, means for biasing said slide member andhead toward said tool including an operating handle mounted on one ofsaid members, a cammed abutment on the other of said members and spacedfrom said handle, a movable spring abutment carried by said handle andmovable therewith into and out of engagement with said cammed abutmenton said other of said members, a compression spring compressed betweensaid movable abutment and said one of said members, and a stop on saidhandle limiting the extension of said spring and said movable abutment.

10. In a machine for presenting workpieces to a finishing tool, thecombination of a head having a rotatable work holding element thereon, asupport member having slideways thereon, a slide member slidable on saidslideways for motion toward and away from said tool, said head beingcarried by said slide member, means biasing said slide member and headtoward said tool, and a manually operable disengaging member forselectively disengaging said biasing means from operative engagementwith said slide member.

HENRY G. PERKINS.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES 'PATENTS Number Name Date 253,890 Rogers Feb. 21, 18821,186,616 Strecker June 13, 1916 1,282,022 Baker et a1 Oct. 22, 19181,481,999 Elzey Jan. 29, 1924

